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How Dinosaurs Really Died Off

The latest concept..An astroid didn't kill off the Dinosaurs. They were already extinct. The astroid came second...sorta like the chicken or the egg mystery...  Hope it gets sorted out someday.

wiseowl wiseowl 61-65, F 4 Responses Jan 19, 2010

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Thanks made that interesting.Good comment. I'd love to go on a dig in Black hills So. Dakota. Suppose to be a great place to find all kinds of goodies.Facinating

I hadn't heard that one. I was on a dig on the cliffs where I grew up and we were identifying the la<x>yer of ash from the asteroid. (odd thing is it does circle the globe) But what was fascinating was the plant material was below it...and then slightly above it. The fossil guy who was with us said the theory was that the after effects acted similiar to a massive volcanic eruption and blocked enough sunlight and produced enough 'acid rain' that the plant life suffered a major die off, which in turned starved the plant eaters, which in turn starved the meat eaters, until finally breeding populations (and the separation of speciies because of tectonic shift) that they did two things. most died off, others continued the evolutionary process and got smaller as well as changing. Now we he told us this he also explained that while it took what we consider a long time, in geologic terms it was the bl<x>ink of an eye. Absolutely fascinating stuff. <br />
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Now the chicken and the egg...probably will be answered the same time we figure out how many angels can dance on the head of a pin :D

That's my belief too.One hit and all gone? No, I have a problem with that. I'm sure a direct hit was devastating but not the END.Still, interesting to me.

It seems impractical to assume an astroid would have killed off enough of the dinosaurs all around the globe to stop them from breeding.<br />
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I've seen mention somewhere that the natural cycle of the earth caused their demise - water shortage if I recall correctly - much like many assume was the demise of groups like the Incas, Mayans, etc.